<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script src="./index.js"></script>
    <script>
        const Person = function(name, age) {
            this.name = name
            this.age = age  
        }

        Person.prototype.say = function() {
            console.log('say hi!')
        }

        const jack = myNew(Person, 'jack', 18)

        console.log(jack)

    </script>
</body>
</html>